Diestock



Feb. 26, 1935. JUDGE 1,992,530

DIESTOCK Filed Feb. 9, 1933 ATTORNEYS Patented Feb. 26, 1935 nms'roox Franklin Judge, Greenfield, Mass, assignor to Greenfield Tap and Die Corporation, a corpora tion of Massachusetts Application February 9, 1933, Serial No. 655,942

3 Claims. (01. 10-127) This invention relates to die stocks, and particularly to a die stock carrying adjustable guiding means adapted to center and aline the work in the die.

The object of the invention is to provide such a die stock in which the die and guide means are separately assembled on the stock with an open space between them.

With this construction extra spaces are provided for the escape of chips between the die and the guide, and there is ready access to oil the die during the progress of the cutting. The body of the die stock may be drop-forged or it may be inexpensively cast without the use of a core and readily finished with accurately smoothed surfaces.

In the accompanying drawing illustrating the invention Fig. 1 is a plan view of an assembled die stock,

Fig. 2 is a vertical sectional view of the die stock shown in Fig. 1. and

Fig. 3 is a view of the various parts disassembled.

In the specific embodiment of the invention illustrated in the drawing the die stock has the die-holding body portion 5 provided with handles 6 and formed with the central cylindrical recess '7 to contain the die 8 held in place by one or more set screws 8, preferably three in number. On the upper portion of the body 5 and surrounding and partially overhanging the recess 7 are four deck lugs 10, each of which has its top surface formed with a ridge 11 within which is a shoulder 12.

The tops of the lugs are thus faced off to receive the cam die plate 13 in annular form having peripheral cut-outs 14 fitting the ridges 11 and an opening 15 centered with respect to the die when the plate 13 is in assembled position resting on the shoulders 12. This cam guide plate 13 forms a deck on the upper surface of which are mounted the adjustable jaws or guides 21 having the lower trunnions 22 fitting in the holes 17 of the plate 13, and with the upper trunnions 23 adapted to be received in the inclined cam grooves 2'7 of the cap 26 fitting down over the deck plate and guides in assembled position and rotating on the outer shoulders 16 of the deck lugs 10 and the inner shoulders of the screw lugs 18.

These screw lugs 18 are formed at the roots of each of the handles 6 and are provided with threaded holes 19 receiving the locking screws 30.- The locking plates 29 under the heads of the 1ocking screws 30 rest at their outer ends on the top edges of the screw lugs 18 and at their inner ends engage the upper surface of the knurled rim 28 rm OFFICE of the cap plate 26. Tightening down on these lock screws 30 presses the plates 29to grip the rim 28 against the shoulders 20 and so look the parts in fixed position with the guide faces 24 of the guides 21 accurately centered with respect to the die 8 and the opening 15. in plate 13 and the opening 25 in the cap 26.

Adjustment of the guides 21 is made by loosening the lock screws and'turning the cam plate 26 by the knurled rim 28, then relocking the parts by the screws 30 when the desired adjustment has been made. Ridges 11 of the deck lugs 10 position the cam guide plate by their inner surfaces and center the cam plate 26 by their outer surfaces, all of these surfaces being faced off together with the shoulders 20 of the screw lugs 18 at a single operation.

The diestock of this invention is open-faced on both sides so that it can either be drop-forged, or if cast, it can be easily machined to provide accurately positioned surfaces for assembly of the various parts. In casting, no coring is necessary so that the casting operation is simple'and inexpensive.

In use the recess in the die stock body permits ready insertion and positioning of the die against the jaws or guides 21 provides additional clear-,

ance through the openings 15 and25, as shown in plan view in Fig. 1. The parts are inexpensive in manufacture and easily and accurately assembled so that close fitting can be provided with proper centering and smooth action of the movable members during adjustment as the rotation of the cam plate 26 causes the cam grooves 27 to engage trunnions 23 and turn them around their lower pivots 22.

Then when the proper adjustment has been made fitting the guides to the periphery of the part being threaded, the tightening of the lock screw presses the locking plates 29 downward to grip the rim 28 of the cam plate 26 against the supporting shoulders of the screw lugs 18 and holds all of the guide parts rigidly and accurately in place. I

I claim:

1. In a die stock the combination with a body portion having handles and a die recess, of a deck plate separate from said body portion, a pair of screw lugs at the roots of the handles, a plurality of separate deck lugs integrally formed with and extending from one side of said body portion and surrounding said die recess and having faces interfitting with and supporting said deck plate on said body portion in spaced relation thereto and leaving openings between said plate and said body, and adjustable guide means carportion and surrounding said die recess and having end faces interfitting with and supporting said deck plate on said body in spaced relation thereto and leaving openings between said plate and said body, and adjustable guide means carried by said deck plate adapted to center the work with relation to a die in said die recess, and comprising a rotatable cover plate interfitting' with the end faces of said lugs and provided with retaining means carried by said lugs.

3. In a die stock the combination with a body portion having handles and a die recess, of a deck plate separate from said body portion, a plurality of separate lugs extending from one side of said body portion and surrounding and overhanging said die recess and having faces interfitting with and supporting said deck plate on said body inspaced relation thereto and leaving openings between said plate and said body, and adjustable guide means carried by said deck plate and adapted to center the work with relation to the die in said die recess, said overhanging lugs acting to position the die in said die recess.

.FRANKLIN JUDGE. 

